Crystal structure, magnetic properties and conductivity mechanisms of La0.7Ca0.3Mn0.5Fe0.5O3
| Autor: | V. S. Zakhvalinskii, Ta Thu Thang, Le Hong Khiem, Sergey E. Kichanov, S. V. Taran, N. T. Dang, Yu. S. Nekrasova, B. N. Savenko, D. P. Kozlenko, S.G. Jabarov, The-Long Phan, Tran Dang Thanh |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Condensed matter physics 02 engineering and technology Crystal structure Conductivity Atmospheric temperature range 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Magnetization Ferromagnetism 0103 physical sciences Antiferromagnetism Orthorhombic crystal system 010306 general physics 0210 nano-technology Ground state |
| Zdroj: | Ferroelectrics. 501:129-144 |
| ISSN: | 1563-5112 0015-0193 |
| DOI: | 10.1080/00150193.2016.1203212 |
| Popis: | La0.7Ca0.3Mn0.5Fe0.5O3 (LCMFO) ceramic samples were prepared by conventional solid-state reaction. X-Ray diffraction investigations show that samples have orthorhombic space group Pnma (a = 5.447(2) Ǻ, b = 7.709(3) Ǻ, c = 5.467(3) Ǻ). During the neutron powder diffraction measurements of LCMFO in the temperature range of 10 ÷ 300 K the antiferromagnetic long-range ordering of G-type was seen. It has been established that 50% substitution of Mn/Fe leads to a complete suppression of the ferromagnetism in LCMFO samples. Investigations of temperature dependence of the magnetization, M(T), suggests the frustration of magnetic ground state and the existence of a spin-glass or a cluster-glass phase below the magnetic transition temperature close to 350 K. The temperature dependences of conductivity for La0.7Ca0.3Mn0.5Fe0.5O3 sample investigated in magnetic fields B = 0 and 1 T. According to the research, the mechanisms of hopping conductivity were established. Micro parameters in density of localized sta... |
| Databáze: | OpenAIRE |
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